LiHD battery packs offer maximum performance and extremely long utilisation with minimal temperature development. Ultra-M technology ensures intelligent battery management for long-lasting battery packs. The patented "Air Cooled" charging technology ensures efficient charging. Permanent electronic single cell monitoring (ESCP) during the charging process contributes to a particularly long service life. Processor-controlled charge and discharge management increases efficiency, while the capacity indicator enables continuous monitoring of the charge status. These battery packs are characterised by a long shelf life with virtually no self-discharge.